| (19) |
 |
|
(11) |
EP 0 248 421 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
07.12.1988 Bulletin 1988/49 |
| (43) |
Date of publication A2: |
|
09.12.1987 Bulletin 1987/50 |
| (22) |
Date of filing: 04.06.1987 |
|
|
| (84) |
Designated Contracting States: |
|
DE GB |
| (30) |
Priority: |
05.06.1986 JP 12925386
16.06.1986 JP 13817986
16.06.1986 JP 13818086
16.06.1986 JP 13818186
|
| (71) |
Applicant: FUJI XEROX CO., LTD. |
|
() |
|
| (72) |
Inventors: |
|
- Aoki,Takayoshi
()
- Takeda, Masayuki
()
- Suzuki, Chiaki
()
- Nagatsuka, Ikutaroh
()
|
|
| |
|
| (54) |
Carrier for developer |
(57) A carrier for developer is disclosed, which comprises a core having an average particle
size of from 50 to 200 µm and comprising fine magnetic particles dispersed in a binder
resin and a polymer overcoat having a critical surface tension of from l0 to 25 dyn/cm
formed on the surface of the core. The carrier has improved chargeability, high resistance
to surface soiling, and high mechanical strength.